Simoneth

[Steps to create magic-dependencies-layer]

1. Launch an EC2 with Amazon Linux 2 OS.
2. SSH into EC2 instance.
    Let me share the commands I’ve used to create layer in this EC2 instance.
   > cd ~
   > mkdir magic
   > cd magic
   > mkdir lib # this directory must be called 'lib'

44213

# To extract the sound from a video and save it as MP3:
ffmpeg -i <video.mp4> -vn <sound>.mp3

# To convert frames from a video or GIF into individual numbered images:
ffmpeg -i <video.mpg|video.gif> <frame_%d.png>

# To combine numbered images (frame_1.jpg, frame_2.jpg, etc) into a video or GIF:
ffmpeg -i <frame_%d.jpg> -f image2 <video.mpg|video.gif>

# To quickly extract a single frame from a video at time mm:ss and save it as a 128x128 resolution image:

liangfu

ffmpeg

Converting Audio into Different Formats / Sample Rates

Minimal example: transcode from MP3 to WMA:
ffmpeg -i input.mp3 output.wma

You can get the list of supported formats with:
ffmpeg -formats

Convert WAV to MP3, mix down to mono (use 1 audio channel), set bit rate to 64 kbps and sample rate to 22050 Hz:

perpetual-hydrofoil

#! /usr/bin/env python

# how to unfollow everyone who isn't following you
# By Jamieson Becker (Public Domain/no copyright, do what you will)

# Easy instructions, even if you don't know Python
#
# 1.  Install pip (apt-get install python-pip) and then
#     pip install tweepy, which is the python twitter client
#